window.onload=()=>{
  let itemsDOM=document.getElementById('items'),
      submitBtn=document.getElementById('submit');
  submitBtn.onclick=(e)=>{
    let item=document.getElementById('item');
    fetch('http://192.168.172.144:8080/todo', {
      method: 'POST', body: 'item='+item.value
    }).then(res => { 
      res.text().then(txt => console.log(txt));  
    });
  };
  fetch('http://192.168.172.144:8080/todo').then(res => { 
    res.text().then(txt => {
      let items=JSON.parse(txt).data;
      itemsDOM.innerHTML=items.map(item=>'<li>'+item+'</li>').join('\n');
    });  
  });
};
